[INFO] cloning repository https://github.com/mjbenitez95/rust-error-handling [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/mjbenitez95/rust-error-handling" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmjbenitez95%2Frust-error-handling", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmjbenitez95%2Frust-error-handling'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] 72e255eebe1cd47e9477bb6c4d201a48c9f3df44 [INFO] checking mjbenitez95/rust-error-handling against master#30840c53f414b753cb08f14620906572f88dda4b for pr-123531 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmjbenitez95%2Frust-error-handling" "/workspace/builds/worker-4-tc1/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc1/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/mjbenitez95/rust-error-handling on toolchain 30840c53f414b753cb08f14620906572f88dda4b [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+30840c53f414b753cb08f14620906572f88dda4b" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] started tweaking git repo https://github.com/mjbenitez95/rust-error-handling [INFO] finished tweaking git repo https://github.com/mjbenitez95/rust-error-handling [INFO] tweaked toml for git repo https://github.com/mjbenitez95/rust-error-handling written to /workspace/builds/worker-4-tc1/source/Cargo.toml [INFO] crate git repo https://github.com/mjbenitez95/rust-error-handling already has a lockfile, it will not be regenerated [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+30840c53f414b753cb08f14620906572f88dda4b" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] [stderr] Blocking waiting for file lock on package cache [INFO] [stderr] Blocking waiting for file lock on package cache [ERROR] error running command: no output for 300 seconds [ERROR] this task or one of its parent failed! [ERROR] no output for 300 seconds [ERROR] note: run with `RUST_BACKTRACE=1` to display a backtrace. [INFO] checking mjbenitez95/rust-error-handling against try#18fb860b8a8e7ca508746882328061d0fe352543 for pr-123531 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmjbenitez95%2Frust-error-handling" "/workspace/builds/worker-4-tc2/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc2/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/mjbenitez95/rust-error-handling on toolchain 18fb860b8a8e7ca508746882328061d0fe352543 [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+18fb860b8a8e7ca508746882328061d0fe352543" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] started tweaking git repo https://github.com/mjbenitez95/rust-error-handling [INFO] finished tweaking git repo https://github.com/mjbenitez95/rust-error-handling [INFO] tweaked toml for git repo https://github.com/mjbenitez95/rust-error-handling written to /workspace/builds/worker-4-tc2/source/Cargo.toml [INFO] crate git repo https://github.com/mjbenitez95/rust-error-handling already has a lockfile, it will not be regenerated [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+18fb860b8a8e7ca508746882328061d0fe352543" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] [stderr] Blocking waiting for file lock on package cache [INFO] [stderr] Blocking waiting for file lock on package cache [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+18fb860b8a8e7ca508746882328061d0fe352543" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] da3e57810c108d6dee2b188f87ae1e7eba4d906d5b1d0f9c330c530cc5949fb4 [INFO] running `Command { std: "docker" "start" "-a" "da3e57810c108d6dee2b188f87ae1e7eba4d906d5b1d0f9c330c530cc5949fb4", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "da3e57810c108d6dee2b188f87ae1e7eba4d906d5b1d0f9c330c530cc5949fb4", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "da3e57810c108d6dee2b188f87ae1e7eba4d906d5b1d0f9c330c530cc5949fb4", kill_on_drop: false }` [INFO] [stdout] da3e57810c108d6dee2b188f87ae1e7eba4d906d5b1d0f9c330c530cc5949fb4 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+18fb860b8a8e7ca508746882328061d0fe352543" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] d5d67f016d0e46f31573d196de4273360766ee67e1a9f27f068d30f7077ed690 [INFO] running `Command { std: "docker" "start" "-a" "d5d67f016d0e46f31573d196de4273360766ee67e1a9f27f068d30f7077ed690", kill_on_drop: false }` [INFO] [stderr] Checking error_handling v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] error[E0308]: mismatched types [INFO] [stdout] --> src/main.rs:88:36 [INFO] [stdout] | [INFO] [stdout] 88 | fn read_user_name_but_concise() -> Result { [INFO] [stdout] | -------------------------- ^^^^^^^^^^^^^^^^^^^^^^^^^ expected `Result`, found `()` [INFO] [stdout] | | [INFO] [stdout] | implicitly returns `()` as its body has no tail or `return` expression [INFO] [stdout] ... [INFO] [stdout] 98 | Ok(s); [INFO] [stdout] | - help: remove this semicolon to return this value [INFO] [stdout] | [INFO] [stdout] = note: expected enum `Result` [INFO] [stdout] found unit type `()` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error[E0308]: mismatched types [INFO] [stdout] --> src/main.rs:101:41 [INFO] [stdout] | [INFO] [stdout] 101 | fn read_user_name_but_more_concise() -> Result { [INFO] [stdout] | ------------------------------- ^^^^^^^^^^^^^^^^^^^^^^^^^ expected `Result`, found `()` [INFO] [stdout] | | [INFO] [stdout] | implicitly returns `()` as its body has no tail or `return` expression [INFO] [stdout] ... [INFO] [stdout] 107 | Ok(s); [INFO] [stdout] | - help: remove this semicolon to return this value [INFO] [stdout] | [INFO] [stdout] = note: expected enum `Result` [INFO] [stdout] found unit type `()` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error[E0308]: mismatched types [INFO] [stdout] --> src/main.rs:88:36 [INFO] [stdout] | [INFO] [stdout] 88 | fn read_user_name_but_concise() -> Result { [INFO] [stdout] | -------------------------- ^^^^^^^^^^^^^^^^^^^^^^^^^ expected `Result`, found `()` [INFO] [stdout] | | [INFO] [stdout] | implicitly returns `()` as its body has no tail or `return` expression [INFO] [stdout] ... [INFO] [stdout] 98 | Ok(s); [INFO] [stdout] | - help: remove this semicolon to return this value [INFO] [stdout] | [INFO] [stdout] = note: expected enum `Result` [INFO] [stdout] found unit type `()` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error[E0308]: mismatched types [INFO] [stdout] --> src/main.rs:101:41 [INFO] [stdout] | [INFO] [stdout] 101 | fn read_user_name_but_more_concise() -> Result { [INFO] [stdout] | ------------------------------- ^^^^^^^^^^^^^^^^^^^^^^^^^ expected `Result`, found `()` [INFO] [stdout] | | [INFO] [stdout] | implicitly returns `()` as its body has no tail or `return` expression [INFO] [stdout] ... [INFO] [stdout] 107 | Ok(s); [INFO] [stdout] | - help: remove this semicolon to return this value [INFO] [stdout] | [INFO] [stdout] = note: expected enum `Result` [INFO] [stdout] found unit type `()` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `f` [INFO] [stdout] --> src/main.rs:62:9 [INFO] [stdout] | [INFO] [stdout] 62 | let f = File::open(&file_name).expect("Failed to open good-morning.txt."); [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_f` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: aborting due to 2 previous errors; 1 warning emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] For more information about this error, try `rustc --explain E0308`. [INFO] [stdout] [INFO] [stdout] warning: unused variable: `f` [INFO] [stdout] --> src/main.rs:62:9 [INFO] [stdout] | [INFO] [stdout] 62 | let f = File::open(&file_name).expect("Failed to open good-morning.txt."); [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_f` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: aborting due to 2 previous errors; 1 warning emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] For more information about this error, try `rustc --explain E0308`. [INFO] [stdout] [INFO] [stderr] error: could not compile `error_handling` (bin "error_handling") due to 3 previous errors; 1 warning emitted [INFO] [stderr] warning: build failed, waiting for other jobs to finish... [INFO] [stderr] error: could not compile `error_handling` (bin "error_handling" test) due to 3 previous errors; 1 warning emitted [INFO] running `Command { std: "docker" "inspect" "d5d67f016d0e46f31573d196de4273360766ee67e1a9f27f068d30f7077ed690", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "d5d67f016d0e46f31573d196de4273360766ee67e1a9f27f068d30f7077ed690", kill_on_drop: false }` [INFO] [stdout] d5d67f016d0e46f31573d196de4273360766ee67e1a9f27f068d30f7077ed690